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\begin{abstract}
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Security is a crucial issue in software development lifecycle and keeps
attracting researchers' interest. To help developers overcoming the challenges
of satisfying security requirements, Model-Driven Security (\mds) has emerged as
a novel security engineering approach in the last decade. \mds specializes
model-driven software development for the enforcement of security concerns.
In this exploratory paper, we propose a Y-Model as a generic evaluating schema for various
\mds methodologies in the literature. We evaluate the capabilities and drawbacks of
these methodologies according to the general goal of \mds. We then analyze the
evaluation result and reason about the evolution process of the development of
\mds. To manage the growing need for modeling heterogeneous security concerns, we
propose enriching the Y-Model in a way that leverages on ontology mapping 
based on our reasoning of the evolution process of \mds.

\end{abstract}
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\begin{IEEEkeywords}

Model-Driven Security; Y-Model; Heterogeneity;

\end{IEEEkeywords}

